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counter

Create a counter that ticks every pass through the node. The default context path is _counter but can be changed in the configuration.

Key​

counter

Configuration Keys:​

  • context_path - The path in the context to store the counter

Results​

  • ok - The arithmetic operation has been run and the results added to the context

Process Method​

public function process(ContextInterface $context): ResultInterface
{
    $contextPath = $this->getRequiredConfigurationValue(self::CONTEXT_PATH, self::DEFAULT_CONTEXT_PATH);
    $counter = $this->getValueFromContext($contextPath, $context);
    if (!$counter) {
        $counter = 0;
    }
    $counter++;
    $this->setValueInContext($contextPath, $counter, $context);

    return $this->result(
        ResultInterface::OK,
        'Changed the counter to %u.',
        [$counter]
    );
}